Find graph node names beginning with a few characters

Is there a way to find out all the node names of a graph that begins with a few characters?

For example, I am working with the CElegans digraph (wormwiring.org). It has nodes named 'DA01', 'DA02', etc. I want to know all the node names that begin with the characters 'DA'.

Thank you so much.

Kamal

Answer 1

[Steven Lord]

Using a modified version of one of the documentation examples and splitting the code into multiple lines for ease of explanation.

A = triu(magic(4));
names = {'alpha' 'beta' 'gamma' 'alphabet'};
G = graph(A,names,'upper','omitselfloops')

G = 
  graph with properties:

    Edges: [6×2 table]
    Nodes: [4×1 table]

listOfNames = G.Nodes.Name

listOfNames = 4×1 cell array
    {'alpha'   }
    {'beta'    }
    {'gamma'   }
    {'alphabet'}

whichNodesStartWithA = startsWith(listOfNames, 'a')

whichNodesStartWithA = 4×1 logical array
   1
   0
   0
   1

namesStartingWithA = listOfNames(whichNodesStartWithA)

namesStartingWithA = 2×1 cell array
    {'alpha'   }
    {'alphabet'}

whichNodesAreTheyInG = findnode(G, namesStartingWithA)

whichNodesAreTheyInG = 2×1

1 4

[Kamal Premaratne]

Fantastic. I had no idea of this function. Just found out about "endsWith", "contains", "pattern", and "lettersPattern".

Thank you so much.